1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2017 Intel Corporation
5 #ifndef _RTE_BBDEV_OP_H_
6 #define _RTE_BBDEV_OP_H_
11 * Defines wireless base band layer 1 operations and capabilities
14 * @b EXPERIMENTAL: this API may change without prior notice
23 #include <rte_common.h>
25 #include <rte_memory.h>
26 #include <rte_mempool.h>
28 /* Number of columns in sub-block interleaver (36.212, section 5.1.4.1.1) */
29 #define RTE_BBDEV_C_SUBBLOCK (32)
30 /* Maximum size of Transport Block (36.213, Table, Table 7.1.7.2.5-1) */
31 #define RTE_BBDEV_MAX_TB_SIZE (391656)
32 /* Maximum size of Code Block (36.212, Table 5.1.3-3) */
33 #define RTE_BBDEV_MAX_CB_SIZE (6144)
34 /* Minimum size of Code Block (36.212, Table 5.1.3-3) */
35 #define RTE_BBDEV_MIN_CB_SIZE (40)
36 /* Maximum size of circular buffer */
37 #define RTE_BBDEV_MAX_KW (18528)
39 * Maximum number of Code Blocks in Transport Block. It is calculated based on
40 * maximum size of one Code Block and one Transport Block (considering CRC24A
42 * (391656 + 24) / (6144 - 24) = 64
44 #define RTE_BBDEV_MAX_CODE_BLOCKS (64)
46 /** Flags for turbo decoder operation and capability structure */
47 enum rte_bbdev_op_td_flag_bitmasks {
48 /**< If sub block de-interleaving is to be performed. */
49 RTE_BBDEV_TURBO_SUBBLOCK_DEINTERLEAVE = (1ULL << 0),
50 /**< To use CRC Type 24B (otherwise use CRC Type 24A). */
51 RTE_BBDEV_TURBO_CRC_TYPE_24B = (1ULL << 1),
52 /**< If turbo equalization is to be performed. */
53 RTE_BBDEV_TURBO_EQUALIZER = (1ULL << 2),
54 /**< If set, saturate soft output to +/-127 */
55 RTE_BBDEV_TURBO_SOFT_OUT_SATURATE = (1ULL << 3),
56 /**< Set to 1 to start iteration from even, else odd; one iteration =
59 RTE_BBDEV_TURBO_HALF_ITERATION_EVEN = (1ULL << 4),
60 /**< If 0, TD stops after CRC matches; else if 1, runs to end of next
61 * odd iteration after CRC matches
63 RTE_BBDEV_TURBO_CONTINUE_CRC_MATCH = (1ULL << 5),
64 /**< Set if soft output is required to be output */
65 RTE_BBDEV_TURBO_SOFT_OUTPUT = (1ULL << 6),
66 /**< Set to enable early termination mode */
67 RTE_BBDEV_TURBO_EARLY_TERMINATION = (1ULL << 7),
68 /**< Set if a device supports decoder dequeue interrupts */
69 RTE_BBDEV_TURBO_DEC_INTERRUPTS = (1ULL << 9),
70 /**< Set if positive LLR encoded input is supported. Positive LLR value
71 * represents the level of confidence for bit '1', and vice versa for
73 * This is mutually exclusive with RTE_BBDEV_TURBO_NEG_LLR_1_BIT_IN
74 * when used to formalize the input data format.
76 RTE_BBDEV_TURBO_POS_LLR_1_BIT_IN = (1ULL << 10),
77 /**< Set if negative LLR encoded input is supported. Negative LLR value
78 * represents the level of confidence for bit '1', and vice versa for
80 * This is mutually exclusive with RTE_BBDEV_TURBO_POS_LLR_1_BIT_IN
81 * when used to formalize the input data format.
83 RTE_BBDEV_TURBO_NEG_LLR_1_BIT_IN = (1ULL << 11),
84 /**< Set if positive LLR soft output is supported. Positive LLR value
85 * represents the level of confidence for bit '1', and vice versa for
87 * This is mutually exclusive with
88 * RTE_BBDEV_TURBO_NEG_LLR_1_BIT_SOFT_OUT when used to formalize
89 * the input data format.
91 RTE_BBDEV_TURBO_POS_LLR_1_BIT_SOFT_OUT = (1ULL << 12),
92 /**< Set if negative LLR soft output is supported. Negative LLR value
93 * represents the level of confidence for bit '1', and vice versa for
95 * This is mutually exclusive with
96 * RTE_BBDEV_TURBO_POS_LLR_1_BIT_SOFT_OUT when used to formalize the
99 RTE_BBDEV_TURBO_NEG_LLR_1_BIT_SOFT_OUT = (1ULL << 13),
100 /**< Set if driver supports flexible parallel MAP engine decoding. If
101 * not supported, num_maps (number of MAP engines) argument is unusable.
103 RTE_BBDEV_TURBO_MAP_DEC = (1ULL << 14),
104 /**< Set if a device supports scatter-gather functionality */
105 RTE_BBDEV_TURBO_DEC_SCATTER_GATHER = (1ULL << 15),
106 /**< Set to keep CRC24B bits appended while decoding. Only usable when
107 * decoding Transport Blocks (code_block_mode = 0).
109 RTE_BBDEV_TURBO_DEC_TB_CRC_24B_KEEP = (1ULL << 16)
112 /** Flags for turbo encoder operation and capability structure */
113 enum rte_bbdev_op_te_flag_bitmasks {
114 /**< Ignore rv_index and set K0 = 0 */
115 RTE_BBDEV_TURBO_RV_INDEX_BYPASS = (1ULL << 0),
116 /**< If rate matching is to be performed */
117 RTE_BBDEV_TURBO_RATE_MATCH = (1ULL << 1),
118 /**< This bit must be set to enable CRC-24B generation */
119 RTE_BBDEV_TURBO_CRC_24B_ATTACH = (1ULL << 2),
120 /**< This bit must be set to enable CRC-24A generation */
121 RTE_BBDEV_TURBO_CRC_24A_ATTACH = (1ULL << 3),
122 /**< Set if a device supports encoder dequeue interrupts */
123 RTE_BBDEV_TURBO_ENC_INTERRUPTS = (1ULL << 4),
124 /**< Set if a device supports scatter-gather functionality */
125 RTE_BBDEV_TURBO_ENC_SCATTER_GATHER = (1ULL << 5)
128 /**< Data input and output buffer for BBDEV operations */
129 struct rte_bbdev_op_data {
130 /**< The mbuf data structure representing the data for BBDEV operation.
132 * This mbuf pointer can point to one Code Block (CB) data buffer or
133 * multiple CBs contiguously located next to each other.
134 * A Transport Block (TB) represents a whole piece of data that is
135 * divided into one or more CBs. Maximum number of CBs can be contained
136 * in one TB is defined by RTE_BBDEV_MAX_CODE_BLOCKS.
138 * An mbuf data structure cannot represent more than one TB. The
139 * smallest piece of data that can be contained in one mbuf is one CB.
140 * An mbuf can include one contiguous CB, subset of contiguous CBs that
141 * are belonging to one TB, or all contiguous CBs that are belonging to
144 * If a BBDEV PMD supports the extended capability "Scatter-Gather",
145 * then it is capable of collecting (gathering) non-contiguous
146 * (scattered) data from multiple locations in the memory.
147 * This capability is reported by the capability flags:
148 * - RTE_BBDEV_TURBO_ENC_SCATTER_GATHER and
149 * - RTE_BBDEV_TURBO_DEC_SCATTER_GATHER.
150 * Only if a BBDEV PMD supports this feature, chained mbuf data
151 * structures are accepted. A chained mbuf can represent one
152 * non-contiguous CB or multiple non-contiguous CBs.
153 * If BBDEV PMD does not support this feature, it will assume inbound
154 * mbuf data contains one segment.
156 * The output mbuf data though is always one segment, even if the input
157 * was a chained mbuf.
159 struct rte_mbuf *data;
160 /**< The starting point of the BBDEV (encode/decode) operation,
163 * BBDEV starts to read data past this offset.
164 * In case of chained mbuf, this offset applies only to the first mbuf
168 /**< The total data length to be processed in one operation, in bytes.
170 * In case the mbuf data is representing one CB, this is the length of
171 * the CB undergoing the operation.
172 * If it's for multiple CBs, this is the total length of those CBs
173 * undergoing the operation.
174 * If it's for one TB, this is the total length of the TB under
177 * In case of chained mbuf, this data length includes the lengths of the
178 * "scattered" data segments undergoing the operation.
183 struct rte_bbdev_op_dec_cb_params {
184 /**< The K size of the input CB, in bits [40:6144], as specified in
186 * This size is inclusive of CRC bits, regardless whether it was
187 * pre-calculated by the application or not.
190 /**< The E length of the CB rate matched LLR output, in bytes, as in
196 struct rte_bbdev_op_dec_tb_params {
197 /**< The K- size of the input CB, in bits [40:6144], that is in the
198 * Turbo operation when r < C-, as in 3GPP TS 36.212.
201 /**< The K+ size of the input CB, in bits [40:6144], that is in the
202 * Turbo operation when r >= C-, as in 3GPP TS 36.212.
205 /**< The number of CBs that have K- size, [0:63] */
207 /**< The total number of CBs in the TB, [1:RTE_BBDEV_MAX_CODE_BLOCKS] */
209 /**< The number of CBs that uses Ea before switching to Eb, [0:63] */
211 /**< The E size of the CB rate matched output to use in the Turbo
212 * operation when r < cab
215 /**< The E size of the CB rate matched output to use in the Turbo
216 * operation when r >= cab
221 /**< Operation structure for Turbo decode.
222 * An operation can perform on one CB at a time "CB-mode".
223 * An operation can perform on one or multiple CBs that are logically belonging
224 * to one TB "TB-mode".
225 * The provided K size parameter of the CB is its size out coming from the
227 * CRC24A/B check is requested by the application by setting the flag
228 * RTE_BBDEV_TURBO_CRC_TYPE_24B for CRC24B check or CRC24A otherwise.
229 * In TB-mode, BBDEV concatenates the decoded CBs one next to the other with
230 * relevant CRC24B in between.
232 * The input encoded CB data is the Virtual Circular Buffer data stream, wk,
233 * with the null padding included as described in 3GPP TS 36.212
234 * section 5.1.4.1.2 and shown in 3GPP TS 36.212 section 5.1.4.1 Figure 5.1.4-1.
235 * The size of the virtual circular buffer is 3*Kpi, where Kpi is the 32 byte
236 * aligned value of K, as specified in 3GPP TS 36.212 section 5.1.4.1.1.
238 * Each byte in the input circular buffer is the LLR value of each bit of the
241 * Hard output is a mandatory capability that all BBDEV PMDs support. This is
242 * the decoded CBs of K sizes (CRC24A/B is the last 24-bit in each decoded CB).
243 * Soft output is an optional capability for BBDEV PMDs. If supported, an LLR
244 * rate matched output is computed in the soft_output buffer structure.
246 * The output mbuf data structure is expected to be allocated by the
247 * application with enough room for the output data.
249 struct rte_bbdev_op_turbo_dec {
250 /**< The Virtual Circular Buffer, wk, size 3*Kpi for each CB */
251 struct rte_bbdev_op_data input;
252 /**< The hard decisions buffer for the decoded output,
255 struct rte_bbdev_op_data hard_output;
256 /**< The soft LLR output buffer - optional */
257 struct rte_bbdev_op_data soft_output;
259 uint32_t op_flags; /**< Flags from rte_bbdev_op_td_flag_bitmasks */
260 uint8_t rv_index; /**< Rv index for rate matching [0:3] */
261 /**< The minimum number of iterations to perform in decoding all CBs in
262 * this operation - input
265 /**< The maximum number of iterations to perform in decoding all CBs in
266 * this operation - input
269 /**< The maximum number of iterations that were perform in decoding all
270 * CBs in this decode operation - output
273 /**< 5 bit extrinsic scale (scale factor on extrinsic info) */
275 /**< Number of MAP engines to use in decode,
276 * must be power of 2 (or 0 to auto-select)
280 uint8_t code_block_mode; /**< [0 - TB : 1 - CB] */
282 /**< Struct which stores Code Block specific parameters */
283 struct rte_bbdev_op_dec_cb_params cb_params;
284 /**< Struct which stores Transport Block specific parameters */
285 struct rte_bbdev_op_dec_tb_params tb_params;
289 struct rte_bbdev_op_enc_cb_params {
290 /**< The K size of the input CB, in bits [40:6144], as specified in
292 * This size is inclusive of CRC24A, regardless whether it was
293 * pre-calculated by the application or not.
296 /**< The E length of the CB rate matched output, in bits, as in
300 /**< The Ncb soft buffer size of the CB rate matched output [K:3*Kpi],
301 * in bits, as specified in 3GPP TS 36.212.
306 struct rte_bbdev_op_enc_tb_params {
307 /**< The K- size of the input CB, in bits [40:6144], that is in the
308 * Turbo operation when r < C-, as in 3GPP TS 36.212.
309 * This size is inclusive of CRC24B, regardless whether it was
310 * pre-calculated and appended by the application or not.
313 /**< The K+ size of the input CB, in bits [40:6144], that is in the
314 * Turbo operation when r >= C-, as in 3GPP TS 36.212.
315 * This size is inclusive of CRC24B, regardless whether it was
316 * pre-calculated and appended by the application or not.
319 /**< The number of CBs that have K- size, [0:63] */
321 /**< The total number of CBs in the TB, [1:RTE_BBDEV_MAX_CODE_BLOCKS] */
323 /**< The number of CBs that uses Ea before switching to Eb, [0:63] */
325 /**< The E size of the CB rate matched output to use in the Turbo
326 * operation when r < cab
329 /**< The E size of the CB rate matched output to use in the Turbo
330 * operation when r >= cab
333 /**< The Ncb soft buffer size for the rate matched CB that is used in
334 * the Turbo operation when r < C-, [K:3*Kpi]
337 /**< The Ncb soft buffer size for the rate matched CB that is used in
338 * the Turbo operation when r >= C-, [K:3*Kpi]
341 /**< The index of the first CB in the inbound mbuf data, default is 0 */
345 /**< Operation structure for Turbo encode.
346 * An operation can perform on one CB at a time "CB-mode".
347 * An operation can perform on one or multiple CBs that are logically
348 * belonging to one TB "TB-mode".
350 * In CB-mode, CRC24A/B is an optional operation. K size parameter is not
351 * affected by CRC24A/B inclusion, this only affects the inbound mbuf data
352 * length. Not all BBDEV PMDs are capable of CRC24A/B calculation. Flags
353 * RTE_BBDEV_TURBO_CRC_24A_ATTACH and RTE_BBDEV_TURBO_CRC_24B_ATTACH informs
354 * the application with relevant capability. These flags can be set in the
355 * op_flags parameter to indicate BBDEV to calculate and append CRC24A to CB
356 * before going forward with Turbo encoding.
358 * In TB-mode, CRC24A is assumed to be pre-calculated and appended to the
359 * inbound TB mbuf data buffer.
361 * The output mbuf data structure is expected to be allocated by the
362 * application with enough room for the output data.
364 struct rte_bbdev_op_turbo_enc {
365 /**< The input CB or TB data */
366 struct rte_bbdev_op_data input;
367 /**< The rate matched CB or TB output buffer */
368 struct rte_bbdev_op_data output;
370 uint32_t op_flags; /**< Flags from rte_bbdev_op_te_flag_bitmasks */
371 uint8_t rv_index; /**< Rv index for rate matching [0:3] */
373 uint8_t code_block_mode; /**< [0 - TB : 1 - CB] */
375 /**< Struct which stores Code Block specific parameters */
376 struct rte_bbdev_op_enc_cb_params cb_params;
377 /**< Struct which stores Transport Block specific parameters */
378 struct rte_bbdev_op_enc_tb_params tb_params;
382 /**< List of the capabilities for the Turbo Decoder */
383 struct rte_bbdev_op_cap_turbo_dec {
384 /**< Flags from rte_bbdev_op_td_flag_bitmasks */
385 uint32_t capability_flags;
386 /** Maximal LLR absolute value. Acceptable LLR values lie in range
387 * [-max_llr_modulus, max_llr_modulus].
389 int8_t max_llr_modulus;
390 uint8_t num_buffers_src; /**< Num input code block buffers */
391 /**< Num hard output code block buffers */
392 uint8_t num_buffers_hard_out;
393 /**< Num soft output code block buffers if supported by the driver */
394 uint8_t num_buffers_soft_out;
397 /**< List of the capabilities for the Turbo Encoder */
398 struct rte_bbdev_op_cap_turbo_enc {
399 /**< Flags from rte_bbdev_op_te_flag_bitmasks */
400 uint32_t capability_flags;
401 uint8_t num_buffers_src; /**< Num input code block buffers */
402 uint8_t num_buffers_dst; /**< Num output code block buffers */
405 /** Different operation types supported by the device */
406 enum rte_bbdev_op_type {
407 RTE_BBDEV_OP_NONE, /**< Dummy operation that does nothing */
408 RTE_BBDEV_OP_TURBO_DEC, /**< Turbo decode */
409 RTE_BBDEV_OP_TURBO_ENC, /**< Turbo encode */
410 RTE_BBDEV_OP_TYPE_COUNT, /**< Count of different op types */
413 /**< Bit indexes of possible errors reported through status field */
416 RTE_BBDEV_DATA_ERROR,
420 /**< Structure specifying a single encode operation */
421 struct rte_bbdev_enc_op {
422 int status; /**< Status of operation that was performed */
423 struct rte_mempool *mempool; /**< Mempool which op instance is in */
424 void *opaque_data; /**< Opaque pointer for user data */
425 /**< Contains encoder specific parameters */
426 struct rte_bbdev_op_turbo_enc turbo_enc;
429 /**< Structure specifying a single decode operation */
430 struct rte_bbdev_dec_op {
431 int status; /**< Status of operation that was performed */
432 struct rte_mempool *mempool; /**< Mempool which op instance is in */
433 void *opaque_data; /**< Opaque pointer for user data */
434 /**< Contains decoder specific parameters */
435 struct rte_bbdev_op_turbo_dec turbo_dec;
438 /**< Operation capabilities supported by a device */
439 struct rte_bbdev_op_cap {
440 enum rte_bbdev_op_type type; /**< Type of operation */
442 struct rte_bbdev_op_cap_turbo_dec turbo_dec;
443 struct rte_bbdev_op_cap_turbo_enc turbo_enc;
444 } cap; /**< Operation-type specific capabilities */
447 /**< @internal Private data structure stored with operation pool. */
448 struct rte_bbdev_op_pool_private {
449 enum rte_bbdev_op_type type; /**< Type of operations in a pool */
453 * Converts queue operation type from enum to string
456 * Operation type as enum
459 * Operation type as string or NULL if op_type is invalid
463 rte_bbdev_op_type_str(enum rte_bbdev_op_type op_type);
466 * Creates a bbdev operation mempool
471 * Operation type, use RTE_BBDEV_OP_NONE for a pool which supports all
473 * @param num_elements
474 * Number of elements in the pool.
476 * Number of elements to cache on an lcore, see rte_mempool_create() for
477 * further details about cache size.
479 * Socket to allocate memory on.
482 * - Pointer to a mempool on success,
483 * - NULL pointer on failure.
486 rte_bbdev_op_pool_create(const char *name, enum rte_bbdev_op_type type,
487 unsigned int num_elements, unsigned int cache_size,
491 * Bulk allocate encode operations from a mempool with parameter defaults reset.
494 * Operation mempool, created by rte_bbdev_op_pool_create().
496 * Output array to place allocated operations
498 * Number of operations to allocate
502 * - EINVAL if invalid mempool is provided
505 rte_bbdev_enc_op_alloc_bulk(struct rte_mempool *mempool,
506 struct rte_bbdev_enc_op **ops, uint16_t num_ops)
508 struct rte_bbdev_op_pool_private *priv;
512 priv = (struct rte_bbdev_op_pool_private *)
513 rte_mempool_get_priv(mempool);
514 if (unlikely(priv->type != RTE_BBDEV_OP_TURBO_ENC))
518 ret = rte_mempool_get_bulk(mempool, (void **)ops, num_ops);
519 if (unlikely(ret < 0))
526 * Bulk allocate decode operations from a mempool with parameter defaults reset.
529 * Operation mempool, created by rte_bbdev_op_pool_create().
531 * Output array to place allocated operations
533 * Number of operations to allocate
537 * - EINVAL if invalid mempool is provided
540 rte_bbdev_dec_op_alloc_bulk(struct rte_mempool *mempool,
541 struct rte_bbdev_dec_op **ops, uint16_t num_ops)
543 struct rte_bbdev_op_pool_private *priv;
547 priv = (struct rte_bbdev_op_pool_private *)
548 rte_mempool_get_priv(mempool);
549 if (unlikely(priv->type != RTE_BBDEV_OP_TURBO_DEC))
553 ret = rte_mempool_get_bulk(mempool, (void **)ops, num_ops);
554 if (unlikely(ret < 0))
561 * Free decode operation structures that were allocated by
562 * rte_bbdev_dec_op_alloc_bulk().
563 * All structures must belong to the same mempool.
566 * Operation structures
568 * Number of structures
571 rte_bbdev_dec_op_free_bulk(struct rte_bbdev_dec_op **ops, unsigned int num_ops)
574 rte_mempool_put_bulk(ops[0]->mempool, (void **)ops, num_ops);
578 * Free encode operation structures that were allocated by
579 * rte_bbdev_enc_op_alloc_bulk().
580 * All structures must belong to the same mempool.
583 * Operation structures
585 * Number of structures
588 rte_bbdev_enc_op_free_bulk(struct rte_bbdev_enc_op **ops, unsigned int num_ops)
591 rte_mempool_put_bulk(ops[0]->mempool, (void **)ops, num_ops);
598 #endif /* _RTE_BBDEV_OP_H_ */